Hydraulic apparatus.



No. 754,113. I PATBNTBD MAR.8,1`904. W. ASTMLCK.I HYDRAULIC APPARATUS.

APPLICATION FILED .TUNE 2Q. 1902.

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APPLICATION FILED JUNE 20. 1902.

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PATENTED MAR. 8, 1904.

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No. 754,113. PATRNTRD MAR. 8.1904.

W. ASTRALGR HYDRAULIC APPARATUS.

APPLIATION LED JUNE 20. 1902.

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RIRNA No. 754,113. A PATENTED MAR. 8, 1904;.` W. ASTFALGK.

HYDRAULIC APPARATUS. APPLI I N EILEE JUNE zo. 1902.

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H0 MODEL 113. PATENTED MAR. 8, 1904.

W. ASTFALGK.

HYDRAULIC APPARATUS.

APP ION FILED JUNE 20. 1902.

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APPLIoATIoN FILED JUNE. 2o. 1902.

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No. 754,113. MT1-11111111 MAR. 8, 1904.

W. ASTFALCK. HYDRAULIC APPARATUS.

APPLIOATION FILED JUNE 20. 1902.

10.754,113. PATBNTED MAR. a, 1904.

W. ASTFALGK.

HYDRAULIC APPARATUS. l

APPLIGATION FILED JUNI: zo. 1902. `H0 mmm.. a SHEETS-SHEET a.

f l M7 1F i @7M No. 754,113. 1 PATBNTBD MAR. a, 19704. y

W. AsTPALcK.

HYDRAULIC APPARATUS.

APPLIoATIoN FILED JUNE zo. 1902.

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f l'IH of a valve, cock, or slide is positively driven- UNrrED STATES Patented March 8, 1904.

.PATENT 4(herren.

HYDRAULIC APPARATUS.

SPECIFICATION forming part of Letters Patent No. 754,113, 'dated Maren s, 1904,

Application led June 20, 1902. Serial No. 112,549. (No model.) y

To all whom it may concern:

Be it known that I, WILAND AsTFALoK, chief engineena subject of' the King of Prussia, German Emperor, and a resident of Berlinerstrasse 92,'Tegel, near Berlin, in the Kingdom of Prussia and Empire of Germany, have invented certain 'new and useful Improvements in' Hydraulic Apparatus, of which the following is a specification.

The present invention relates to a new or improved apparatus for controlling hydraulic' presses, shears, stamps, and other pressing deter, and the exhaust of the cylinder take place' in predetermined order and time and are initiated from a central position, and, further, that thecut-oft1 or controlling device inserted in the low-pressure conduit and in the form in such a manner that it closes beforethe highpressure conduit'is opened to the pressurespace of the cylinder and, inversely, that itI does not open until after the high-pressure conduit is closed to the pressure-space of the cylinder. By the latter feature of the invention the advantage is also obtained that thev used pressure-water can be conducted through the special valve or' the low-pressure conduit back i-nto the latter and the piston or ram moved rapidly upward and downward. The various cut-off or controlling devices may be in the form of valves, cocks, or slides.

rlhe annexed drawings' represent several forms of the invention, Figures 1 to 6 illustrating diagrammatically and in section one' form of the ,controlling apparatus in differentworking positions. Fig. 7 represents a modiiication of one part of the controlling mechanism. Figs. 8 and 9 represent diagrammatically and in section two other forms of construction, with some modifications in Figs. 10, 10a, 11, and 11, of which the two former are pressure conduit; 7 the cut-off device inserted lin the latter; 8, the thrust-block for the working stamp 9; 10, the exhaust-conduit for the pressure-Water used; 11, the controlling-lever, and12 to 15 the conduit continuouslylled with high-pressu re water. Further, in allforms of construction 'the entire controlling mechanism consists of four parts or divisions-namely, the preliminary devices or valves moved' prior to the movement of the remaining valves, de-

vices for controlling the-.high-pressure conduit, devices for controlling the low-pressure conduit, and devices 'for .initiating the descent and ascent of the pistonand herein termed return-controlling devices.

In all forms of construction .the preliminary and return control are arranged as follows:

The lever l1, pivoted at a, is connected by a link c with va lever 18, pivoted at b. By means of this lever 18 the lever 11 controls the cutoff device 19, placed in the chamber d, which represents part of the return-controlling de- V vices or mechanism. The lever l1 also controls the two valves 16 and 17, of which the former is placed in a chamber e, the latter in'. a chamberf. These valve-chambers communicate with each other by a channel 23, into which the pipe 24 leads. The valve-chamber e also communicates with the pipes 14 and 15,

and the chambcrf communicates with the pipe 10. The chamber d communicates on one hand with the pipes 15 and 20 and on the other hand d with a branch of the pipe 10.

In the form of construction shown in Figs. l to 6 the controlling mechanism for the highpressure pipes or high-pressure control comprises a valve 34, connected to the Acontrollingpiston 33 and arranged in the chamber g. The

latter communicates with the high-pressure' pipes 12, 13, 14, ,and 36. The' cylinder It of the controlling-piston 33- communicateswith the pipes 13 and 32. The rod t', connecting Vthe valve34 to the controlling-piston 33, is

pivotally connected to a lever 35, fulcrumed IOC at said lever 35 controlling a valve 27,

placed in the chamber m. The latter communicates with the pipes 26 and 28.

In the form ot' construction under consideration the controlling-gear for the low-pressure pipe 6 or low-pressure control comprises the valve 7, before referred to, rigidly connected by a rod nwith a controlling-piston 29 and pivotally connected to a lever 30, fulcrumcd at o. The cylinder fr of the said controlling piston 29 communicates' with the pipes 14 and 28. At the side of the`lowpres sure pipe a valve-chamber s is arranged, communicating with the pipes 25 and 32, the valve 31 therein being controlled by the lever 30.

The controlling action with the form of controlling-gear shown in Figs. 1 to 6 is as follows: IVhen the pressure-piston 5, with the stamp 9, is to be moved downward onto a piece of work (not shown in the drawings) placedon the block 8 and pressure is then to be exerted, the controlling-lever 11 is irst moved into the position shown in Fig. 2. The valve 16 still remains closed and the valve 17 opened, although the latter has moved downward somewhat. On the other hand, the controlling device 19 will have'moved into the position shown in Fig. 2. and the pipe 20 is thus put into communication with the exhaust-pipe 10, so that the pressure-water in the cylinder-space 21 can iow o' through these pipes, and the pressure-piston moves downward into the position shown in Fig. 3. At the same time the cylinder-space 22 above the piston is filled with low-pressure water, owing to the valve 7 being open. If the controlling-lever is moved from position II to position III, as Shown in Fig. 4. the controlling device 19 is moved still farther downward; but the pipes 20 and 10 remain, as before, in communication with each other. At the same time, however, the valve 17 is completely closed and the valve 16 opened. The highpressure water now passes from the pipe 14 through the open valve 16, channel 23, pipes 24 and 26, open Valve 27, and pipe 28 underneath the controlling-piston 29 and moves the latter, with the valve 7, into the position shown in Fig. 4, so that the low-pressure pipe 6 is shut oii" from the cylinder-space 22. At the same time the valve 31 has been opened by the upwardly-moved lever 30, so that the high-pressure water which has passed from the pipe 24 into the pipe 25 can pass through the valve 31 and pipe 32 to beneath the controlling-piston 33 and can move the latter, with the valve 34, upward intothe position shown in Fig. 5. The-lever 35 is thus at the same time so moved that the valve 27 is released and closes. The pressure-Water now passes from the high-pressure pipe 12 through the valve 34 and the pipe 36 into the cylinder 22 in order to there perform the high-pressure work on the piston 5. It' the piston is to be moved back again into the poynieves with the connecting-rod 1,' the said le- 'ver opens the valve 27, so that the controlling-piston 29 is also relieved of pressure on its under side and is moved downward with the valve 7 by the high-pressure water in the pipe 14-that is to say, all the valves or controlling devices again assume the positions shown in Fig. 1. rI`he lever is then moved from position I into position IV, as shown in" Fig. 6. By this means the controlling device 19 is moved so far upward that the pipes 15 and 2O are placed in communication with each other,and the high-pressure water passes from the pipes `12, 14, and 15 through the pipe 2O into the cylinder-space 2l below the piston vand moves the latter, as intended, back into the position shown in Fig. 1. At the same time the low-pressure water contained in the cylinder-space 22 is forced back into the lowpressure pipe 6 through the open valve 7. When this has taken place, the controllinglever 11 is moved back into position I, by which means the pipe 20-is shut off from the pipe 15. The same operation can then be repeated.

Instead ofthe rocking lever 30 an arm 30 `integral with the connecting-rod fn and extending under the valve 31 can be used, as shown in Fig. 7.

In the form of construction shown in Fig. 8 only the controlling 'mechanisms for the low-pressure and high-pressure systemsis modified, a slide 37 being provided instead of the controlling-piston 29 and the valve 31, said slide being placed in the chamber u. The latter is in communication with the pipes 14, 32,25, and 28. The slide 37 not only moves the valve 7, but at the same time controls the pipes 25 and 32. Instead of the controllingpiston 33 and the valve 27 a slide 38 isarranged in the chamber fw, said slide 36 controlling the pipes 26 and 28, for which purpose the slide-chamber communicates both with these pipes and with the pipes 13 and 32. The action is the same as with the form shown in Figs. 1 to 6.

In the modification shown in Fig. 9 the valves 27 and 31 of Figs. 1 to 6 are dispensed with. The pipe 24 communicates directly with the cylinder lr of the controlling-piston 29, and the pipe A26 communicates with the cylinder h. The double-armed lever fulcrumed at lf is connected by a link 39 with a bell-crank lever 41 42, fulcrumed at 40. The shorter arm 42 of the bell-crank lever is hook-shaped, so that lI OO IZO when the valve 7 is lclosed the said arm 42 extends under1 a 'projection orl collar 43 on the valve-rod n and does not release the valve 7 until the valve 34 is closed, or, vice versa, the valve 34 cannot beA opened until the valve 7 has been closed. When' the valve 7 is open, the arm 42 bears against the projection 43, so that a displacementof the controlling-piston 33 with the valve 34 is not poszible. In this form of construction, therefore, the two valves 7 and 34 do 'not control each other by hydraulic means, but by mechanical means. The actionof the controlling-gear as a-whole is, however, the same as with the form shown in Figs. 1V to 6, so that it will be unnecessary to again describe it.

In the forms of construction shown in Figs. 1 to 9 the controlling device 19 is operated by means of the controlling-lcv er 11 with the aid of the link c and leverslS. Theoperation of the controlling device by the controlling-lever can, however, obviously be effected by hydraulic means.

In the practical example illustrated in Figs.

"10, 10a, 11, and 11a, which is similar to the construction shown in Fig. 8,-the-controllinglever 11 is connected to two slides and y, moving in the valve-boxes e and f, the said slides being situated below the valves 16 and 17. In place of the conical valve 7 a circular slide is arranged, and the latter is not directly but indirectly connected to the piston-slide 37. For this purpose the slide-box z, provided with a suitable bracket D, is secured to the pressure-,cylinder 4, for instance, and provided with a double-armed lever F, pivoted at E, which is connected by means of suitable links G and H, on the one hand, to the circularl slide 7, which cuts off the low-pressure pipe, and, on the other hand, to the pistonslide 37, arranged in the cylinder u. The slide-box z of the low-pressure pipe 6 communicates with the space 22 of the pressure-cylinder 4 by means of a pipe K. The cut-off devices 37, 38, and 34 are in the revei'sed order tothat shown in Fig. 8; but this fact has no influencey on the v action of the arrangement as a whole. rIhe pressure-cylinder itself is carried by columns L, and the working lstamp 9 of the piston is guided by aslide or cross-headM, moving, for instance, along the said columns. The stamp 9 can, however, be movable in the slide M instead. In place of the' conical valve 34 a pis ton-slide is also used. The chambers w and g of the two cut-off devices 38 and 34 may be connected to each other by bolts N. The exhaust-pipe 10 leads directly into the lowpres'sure pipe 6 or into the slide-box z, so that no waste of water can occur. The action of this practical example is, however, exactly the same as that of they form of construction shown in Fig. 8. Shouldv the pressure-piston" 5 require to bemoved downward onto a piece of work, then is lever 11 in Fig. 10 moved so far downward that the controlling `device 19 joins the vpipes 20 and 10. Through this motion of lever 11 an opposed movement ,of the slides m and y takes place at the same time. By this motion the former of these slides has not as yet opened valve 16, while slide y still holds valve 17 partly' open. From the bottom of the pressure-cylinder 4 the water? now pours into the low-pressure pipe 6 through pipes 2O and 10. At 'the same time the cyl- -inder-space 22 becomes filled with low-pres- `sure water from low -pressure conduit 6. Should lever 11 be moved still farther downward, pipes 20 and 10 will still be joined; but valve 17 will be free, so that it can be closed, and valve 16 will be opened yby slide w. The highpressure water from high-pressure pipe 12 is issued through pipe 14, valve 16, channel 23, pipes 24 25,.cylinder w, and pipes 28 into the spaceabove the piston 37 and pushes this piston 37 downward, so that `the lowpressure pipe 6 will be shut off through the cutoff device 7 toward cylinder-space 22, while the pipes 25 32 will be joined together by the recess in piston 37. v The high-pressure water can now pass from pipe 24, through pipe 25, into pipe 32 and from there reach the cylinder-space above the double piston 38 34 and press the latter downward. When this has happened, `then the pipes 26 and 28 are closed from each other,cwhereas pipes 14 and 36, through channel13 of cylinder g, are joined together. The high-pressure water will now reach cylinder-space 22 above the pressurepiston 5 through conduits 12 14, through the pipe 36, and effects there the necessary pres- IOO sure; but should the -piston require to be l moved back, as in the designated place of Fig.

10, then will also the lever 11 be placed as in Fig. 10.' Hereby takes place a shutting off of pipes 10 and 20, a closing of the valve 16, and an opening of the valve 17 The upper part of the double pistons 38 34 becomes pressure free, for the high-pressure water above 4the same canpass to the low-pressure pipe 6 through pipe 32, cylinder u, pipes 25 24,

. channel 23, valve 17, and pipe 10. The highpressure water coming through channel 13 and. working on the lower working end of this double piston 38 moves'the same back in the designated position of Fig. 10, so that pipes 14 and 36 are closed against each other and pipes 26 28 are opened toward each other.

IIO

Hereby is also the upper part of piston 37 pressure free, as the'high-pressure water over the same can pass into the low-pressure plpe V6 through pipes 26 2824, channel 23,- valve 17, and pipe 10. Piston 37 is now pushed back in position (designated on Fig. 10) by .the high-pressure water coming through plpe 14, so that the pipes 25 32 are closed agamst each other, while a downward motion' of the cut-off device 7 has taken place and' which causes an opening of the low-pressure pipe 6. If now lever 11 is moved upward, valve 17 opens farther without producing any result,

however; but through the moving of the cutoff device 19 pipes 15 20 are placed in communication with each other, so that the highpressure water passes from pipes 12 14 through pipe 15, cut-off device 19, and pipe 20, and in` the cylinder-space below the pressure-piston and moves the pressure-piston to the designated position of Fig. 10, as intended. At4

formed' by a controlling device 19 initiating the upward and downward movement of the pressure-piston 5 and connected with the controlling-lever 11, an advance control formed by two controlling-valves 16, 17, directly operated by the controlling-lever, a high-pressure control formed by the controlling-valve 27, piston 33, valve 34 and lever 35, and a low-pressure control formed by controlling-valve 7, and its piston, the valve 31 and means connecting said valves for cooperation, the two latter acting in the required time and order, according to the upward or downward movement of the pessure-piston by the advance-control valves 2. In a device of the class described, the combination with a pressure-cylinder, a piston 5, a low-pressure supply, a high-pressure supply, and a controlling-lever 1l; of a return control formed by a controlling device 19 initiating the upward and downward movement of the pressu re-piston 5, and connected with the controlling-lever 11, an advance control formed by two controlling-valves 16, 17, directly operated by the controlling-lever, a high-pressure control formed by the controlling-valve 27, piston 33, valve 34, and lever 35, a lowpressure control formed by controlling-valve 7, and its piston, and the valve 31, said controlling-valves 7 and 31 being arranged side by side and connected to each other by a rocking lever so'that said controlling-valve 31 is positively moved by the controlling-valve 7, and the valve 31 and rocking lever acting in the required time and order, according to the upward or downward movement .of the pressure-piston by the advance-control valves 16, 17.

3. In adevice of the class described, the combination with a pressure-cylinder and a piston, of a high-pressure supply leading to both sides of theI cylinder, a low-pressuresupply leading to one side of the cylinder only, a controlling tions between the same and the controlling devices, said controlling devices and connections comprlslng provision by virtue of which the 'low-pressure-controlling device closes before the high-pressure-controlling devices open and vice versa.

4. In a device of the class described, the combination with a pressure-cylinderand apiston, of a high-pressure supplyleading to both sides of the cylinder, a low-pressure supply leading to one side of the cylinder only, a controlling device for controlling the low-pressure supply, 'controlling devices for controlling the high-pressure supply, both the controlling means operated by the high-pressure supply, connections between the low pressure-controlling means and the high-pressure-controlling means, permitting the operation'of the high-pressure controlling means, after the low-pressure-controlling means for movement of the piston in one direction and vice versa, for movement of piston in the other direction.

5. In adevice of the class described, the combination with a pressure-cylinder, and a piston; of a high-pressure supply having a branch leading to the upper part of the pressure-cylinder, and a branch leading to the lower part of said cylinder; a low-pressure supply leading to the upper part of the cylinder; a fluidoperated controlling means for controlling the low-pressure supply; fluid-operated controlling means for controlling the high-pressure supply leading to the upper part of the cylinder; connections from the high-pressure supply to the low-pressure-controlling,device to open it, and to the high-pressure-controlling device to close it; controlling means 16, 19 in Athe high-pressure supply which leads to the lower part of the pressure-'cylinder and to the low-pressure-controllingdevice; supply-pipes from the controlling means 16 and the lowpressure-controlling means to the high-pressure-controlling means of the branch which leads to the upper part of the pressure-cylinder tov connect the low-pressure-controlling device and the high-pressure-controlling device, said connections permitting the highpressure-controlling device to open only after the low-pressure-controlling device is closed or the low-pressi:re-controlling device to open only after the high-pressure-controlling device is closed.

6. In a device of the class described, the combination with a pressure-cylinder and a piston; of a high-pressure supply having a branch leading to the upper part of thcpressure-cylinder, and a branch leading to the lower part of said cylinder; a low-pressure supply leading to the upper part of the cylinder; a fluid- IOO IIO

to the lower part of the pressure-cylinderand to the low -pressurecontrolling device;

supply-pipes from the controllingmeans16 and the low-pressure-'controlling means to the high -pressure-controlling means of the branch which leads to the upper part of the pressurei cylinder, to connect the loW-pressure-controlling device and the )high-pressure -controlling device said connections permitting the high- 4pressure-controlling device to open only after the lo'W-pressure-controlling device is closed or the low-pressure-controlling device to open only after the' high pressure controlling device is closed; and a means permitting vthe fluid to flow from the controlling-means supply.

7 In a device of the class described, the combination, with a pressure-cylinder, and a piston, of a high-pressure supply having a branch leading to the upper part of the -pressure-cylinder, and a branch leading to the lower part of said cylinder; a low-pressure supply leading to the upper part of the cylinder; Huid-- operated4 controlling means for controlling the low pressure supply; uid operated controlling means for controlling the high-pressure supply leading to the upper part of the cylinder; connections from `the high-pressure supply to the low-pressure-controlling device to open it, and to the high-pressurecontrolling device to close it; controlling means 16, 19 in the high -pressure supply which leads to the lower part of the pressure-cylinder and to the low-pressure-controlling device; supply-pipes from the controlling means 16 and the loW-pressure-con- Y trolling means to the high-pressure-controlling means of the branch 4which leads to the upper part of the pressure-cylinder, to connect the low-pressure-controlling device and lthe high-pressure-controlling device, said connections permitting the high-pressure-controlling device to openonly after the low-v pressure-controlling device is closed or thev low-pressure-controlling device to open only after the high-pressure-controlling device is closed; a means permitting the fluid to flow from the controlling-means supply, and a single lever shiftableto various positions operating, in 'predeterminedorden the high-pressure-controlling device that controls the supv ply to thev low end of the pressure-cylinder,

the controlling device 16, and the means which permits the iuid in the controlling-means sup,-4

ply to llow out. l

.In -witness whereof I have hereunto set my hand in presence of two witnesses. d j '.-WILAND AsTFALcK. Witnesses:

HENRY Hnsrnn, WOLDEMAR HAUPT. 

